The George Blog – More No. 165 plans & Comments

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More No. 165 plans

I've just added plans for the lapstrake planks – Plank Nos. 1 through 7. The rest will follow shortly.

These are fully dimensioned drawings of the developed shapes of the planks, which should enable them to be set out and made without taking the shape off the frames and floors set up in the building jig.

The developed shape is the shape that has to be cut out of a flat sheet (in this case a flat sheet of ply), to be the correct shape when bent around the boat. Determining the developed shape of lapstrake planking is one of the more difficult processes as they don't exactly follow the hull shape because the bottom edges of each plank lap over the top edges of the previous plank.

To further complicate things, there is no hard and fast rule about how the planks should run, so there is a degree of choice about the matter.

The upshot is that I am recommending the builders of the first few boats which are currently in build to at least check the first two or three plank shapes from the frames etc. in the jig, in the traditional fashion. Both to ensure their accuracy and to make sure that they are pleasing to the eye.

I have also re-issued the sidedecks and foredeck plans to correct some dimensional errors. Issue 02 of both are on site now.

Again these are fully dimensioned drawings that enable builders to set out the shapes of the decking without reference to the boat itself.

Comments

All 13 planks finished. Thank goodness for that. A lot of dimensioning!
Date posted: Wednesday, 22 Apr 2015 | posted by: debenriver

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